Multipolar electrical connector

ABSTRACT

It is an object of the invention to provide a configuration wherein, in a multipolar electrical connector B, when a counter electrical connector 100 is not inserted, a number of contacts 3 are individually protected from an external force, and, when the counter electrical connector 100 is inserted, even if the contacts are somewhat bent, the contacts can be connected in an unforced manner with contacts of the counter electrical connector. In the multipolar electrical connector B, a cover member 4 is disposed in an insertion space 2 formed in the body 1, so as to be movable in extracting and retracting directions. The tip ends of the contacts 3 are housed in hole portions 41 of the cover member 4. Spring members 5 for urging the cover member 4, and an engaging mechanism 10 which restricts the position of the cover member are disposed between the body 1 and the cover member 4.

TECHNICAL FIELD

The present invention relates to a multipolar electrical connector, andparticularly to a multipolar electrical connector in which a number ofcontacts are arranged and protruded into an insertion space for acounter connector.

BACKGROUND ART

In a multipolar electrical connector of this kind, contacts areconfigured by pins of a diameter of 0.8 mm, or by thinner pins of adiameter of 0.5 mm. The distance between adjacent contacts (the pitch ofthe contacts) is as small as about 2 mm. If one of the contacts is bentand the pitches of the contacts are partly disturbed so that the pitchesare no longer uniform, there arise problems as follows. When a counterelectrical connector is inserted into an insertion space of the body,the end face of the counter electrical connector bumps against thecontact, with the result that the counter electrical connector cannot becompletely inserted. When the counter electrical connector is furtherinserted by force, the contact which bumps against the end face buckles.

Such misalignment of contact pitches due to a bend of a contact easilyoccurs, for example, in the case where an external force is accidentallyapplied to a contact in handling such as that the multipolar electricalconnector is transported or mounted to an apparatus, or where one ormore of the contacts are twisted when a counter electrical connector isinserted into an insertion space for the connector.

In a prior art multipolar electrical connector, an insertion space isdefined and a number of contacts are pressingly inserted into the body,thereby protruding them into the insertion space for a counterelectrical connector, which insertion space is disposed in the body.Therefore, a sort of protection against an external force is realized asa whole by peripheral walls which define the insertion space. However,such protection is not done in such a manner that the contacts areindividually prevented from being subjected to an external force.Consequently, a bend or buckling of a contact which may occur in thecase such as where an external force is accidentally applied or whereone or more of the contacts are twisted by a counter electricalconnector inserted into the insertion space cannot be surely preventedfrom occurring.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a multipolarelectrical connector wherein a cover member is disposed in an insertionspace of the body, the cover member being displaceable in the insertionspace together with a counter electrical connector which is to beinserted into and extracted from the insertion space, and the multipolarelectrical connector is configured so that, when the counter electricalconnector is not inserted into the insertion space, the tip ends of thecontacts do not protrude outside of the cover member, whereby, when thecounter electrical connector is not inserted, the contacts areindividually protected from an external force.

It is another object of the present invention to provide a multipolarelectrical connector wherein the connector is configured so that, evenin the case where a contact is bent, when the bend is formed undercertain conditions, the contact is introduced into a hole portion of acounter electrical connector when the counter electrical connector isinserted into an insertion space of the body, while being guided by ahole portion which is formed in a cover member, whereby all contacts canbe respectively connected in an unforced manner with contacts of thecounter electrical connector.

In order to attain the noted objects, the multipolar electricalconnector of the present invention is a multipolar electrical connectorwhich comprises a body having an insertion space for a counterelectrical connector, and a number of contacts which protrude into theinsertion space while being arranged at predetermined spaces, whereinthe connector further comprises: a cover member which is placed in theinsertion space, covers an opening portion of the insertion space, andis displaceable in the insertion space in directions of inserting andextracting the counter electrical connector; a number of hole portionswhich are opened in the cover member in an arranged manner and intowhich contacts are loosely inserted, respectively; a spring member whichis interposed between the body and the cover member and always urges thecover member in the direction of extracting the counter electricalconnector; and an engaging mechanism which is interposed between thebody and the cover member, restricts a position of the cover memberwhich is urged by the spring member, thereby blocking the cover memberfrom protruding from the insertion space, and, when the position of thecover member is restricted, places tip ends of the contacts atintermediate portions in an axial direction of the hole portions of thecover member, the hole portions respectively corresponding to thecontacts.

According to the multipolar electrical connector of the presentinvention, when the counter electrical connector is not inserted intothe insertion space of the body (noninsertion period), the cover memberurged by the force of the spring member is displaced to a position towhich the cover member is restricted by the engaging mechanism, and, inthis state, the tip ends of the contacts are placed at intermediateportions in an axial direction of the hole portions of the cover memberwhich respectively correspond to the contacts. Therefore, the tip endsof the contacts which are housed in the insertion space for the counterelectrical connector do not protrude to the outside of the cover member,and hence the case where the contacts are hit by something neverhappens.

When the counter electrical connector is inserted into the insertionspace of the body (insertion period), the cover member is pushed againstthe force of the spring member by the counter electrical connector so asto be forcedly moved in the insertion direction. As the cover member ispushed inward, the contacts relatively protrude from the respective holeportions of the cover member, and the tip ends of the contacts areintroduced into the respective hole portions of the counter electricalconnector while being guided by the hole portions of the cover member.

In the multipolar electrical connector, preferably, the diameter of anopening portion of each of the hole portions of the cover member has asize which is not greater than that of an opening portion of each of thecontact introducing hole portions which are opened in the end face ofthe counter electrical connector.

According to this configuration, the case where the tip ends of thecontacts protrude from the hole portions of the cover member and collideagainst or are caught by the end face of the counter electricalconnector never happens. Therefore, the above-mentioned function thatthe tip ends of the contacts are introduced into the respective holeportions of the counter electrical connector while being guided by thehole portions of the cover member is more remarkably exerted.

In the multipolar electrical connector, a configuration may be employedin which a number of contacts which are pressingly inserted into thebody protrude into the insertion space for the counter electricalconnector, the insertion space being formed in the body.

According to this configuration, the whole of the portions of thecontacts which protrude into the insertion space is covered by the bodyand the cover member, and hence the tip ends of the contacts do notprotrude outside of the cover member so that the case where the contactsare hit by something never happens. Preferably, the spring member isinterposed between the body and both ends in the longitudinal directionof the cover member in the insertion space for the counter electricalconnector.

In the thus configured multipolar electrical connector, a configurationmay be employed in which an engaging claw which protrudes outwardly morethan an edge of the cover member is disposed respectively on both sidesof the center of the cover member, openings are formed in peripheralwalls defining the insertion space for the counter electrical connector,the openings respectively housing the engaging claws in such a mannerthat the engaging claws are displaceable in the directions of insertingand extracting the counter electrical connector, the engaging mechanismis configured by opening edges of the openings which opening edges arepositioned in the direction of extracting the counter electricalconnector, and faces of the engaging claws which oppose the openingedges, respectively. In this case, preferably, faces of the engagingclaws which are on the sides opposite to the faces opposing the openingedges, are inclined in such a manner that, moving more outwardly, thefaces are positioned in the direction of extracting the counterelectrical connector.

According to this configuration, the cover member can be attached to thebody only by pushing the cover member into the insertion space of thebody while using the inclined faces of the engaging claws disposed onthe cover member as a guide.

In the thus configured multipolar electrical connector, preferably, theperipheral walls defining the insertion space for the counter electricalconnector serve as a positional alignment guide for the insertion of thecounter electrical connector into the insertion space.

In this configuration, the hole portions of the counter electricalconnector are positionally aligned with the hole portions of the covermember by the peripheral walls defining the insertion space for thecounter electrical connector. Therefore, the above-mentioned functionthat the tip ends of the contacts are introduced into the respectivehole portions of the counter electrical connector while being guided bythe hole portions of the cover member is more remarkably exerted.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partly cutaway plan view showing a multipolar electricalconnector of an embodiment of the present invention.

FIG. 2 is a partly cutaway and partly sectional front view showing themultipolar electrical connector of FIG. 1.

FIG. 3 is a vertical section view of the multipolar electrical connectorof FIG. 1.

FIG. 4 is an enlarged view showing the main portion of FIG. 3.

FIG. 5 is a vertical section view showing other portions of themultipolar electrical connector of FIG. 1.

FIG. 6 is a partial perspective view of a card having a counterelectrical connector.

FIG. 7 is an enlarged vertical section view showing the main portion andillustrating a function of the multipolar electrical connector which isexerted when the counter electrical connector is to be inserted.

FIG. 8 is an enlarged vertical section view showing the main portion andillustrating a function of the multipolar electrical connector which isexerted when the counter electrical connector is to be inserted.

FIG. 9 is a plan view showing a multipolar electrical connector ofanother embodiment of the present invention, in partly cutaway.

FIG. 10 is a partial perspective view of a card having a counterelectrical connector.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

In a multipolar electrical connector B shown in FIGS. 1 to 5, the body 1is formed from a synthetic resin which has excellent electricalinsulating properties. The body 1 comprises a laterally elongatinginsertion space 2 into which a counter electrical connector 100 is to beinserted into and extracted from. The body 1 comprises boss portions 11for attaching the body 1 to an apparatus or a wiring board (not shown),and positioning projections 12.

In the insertion space 2, a number of pin contacts 3 protrude, beingarranged at equal spaces. In the embodiment, the contacts 3 are arrangedin two rows of 30 contacts each. Each of the contacts 3 has a diameterof 0.5 to 0.8 mm, and the distance between adjacent contacts 3, 3 in thesame row (the pitch of the contacts) is 2 mm. As seen from FIG. 3, thecontacts 3 are pressingly inserted into through hole portions 13, whichare formed in the body 1 and have a smaller diameter, so as to protrudeinto the insertion space 2. Pin terminal portions 31 which arerespectively elongated from the contacts 3 are immovably held by aslit-like terminal holder 14 which is disposed on the side of the body1.

The reference numeral 4 designates a cover member. The cover member hasa shape in plan view which is similar to that of the insertion space 2,and a size which, when the cover member 4 is fitted into the insertionspace 2, the cover member can substantially cover the whole of theopening portion of the insertion space 2. In the cover member 4, anumber of hole portions 41 are opened in the same arrangement pattern asthat of the contacts 3. The diameter of each of the hole portions 41 isgreater than that of the contacts 3. Specifically, when the contacts 3have a diameter of 0.4 mm, the diameter of the hole portions 41 may beset to be, for example, 0.8 mm. In FIG. 4, the diameter of the contacts3 is indicated by the reference numeral D1, and that of the holeportions 41 by the reference numeral D2.

As shown in FIG. 5, engaging claws 42 which protrude outwardly more thanthe cover member 4 are disposed on the sides which are respectively onboth sides of the center of the cover member 4, specifically, on theedges in the width direction of the cover member 4. In each of theengaging claws 42, a face in a direction A2 for extracting the counterelectrical connector 100, serves as an engaging face 43, and the face 44opposite to the engaging face 43 serves as a guide face which isinclined in such a manner that, when moving outward, the face ispositioned in the extraction direction A2. In contrast, longitudinallyelongated openings 16 are opened in the peripheral walls 15 defining theinsertion space 2 in the body 1, specifically in the peripheral walls 15which are positioned in the width direction of the insertion space 2.The cover member 4 is disposed in the insertion space 2 in such a mannerthat the cover member is movable in directions A of inserting andextracting the counter electrical connector 100 and can substantiallycover the whole of the opening portion of the insertion space 2.

For example, the assembling work for disposing the cover member 4 in theinsertion space 2 is conducted in the following manner. Namely, theinclined guide faces 44 of the engaging claws 42 of the cover member 4are pressed against the edges of the peripheral walls 15, and then thecover member 4 is pushed in a direction A1 so as to be pressinglyinserted into the insertion space 2. This causes the engaging claws 42to override the peripheral walls 15 to be respectively fitted into theopenings 16. Then the contacts 3 are loosely fitted into the holeportions 41 which respectively correspond to them. In this way, thecover member 4 can be disposed in the insertion space 2. In theembodiment, three engaging claws 42 are formed on each of the edges inthe width direction of the cover member 4, and three openings 16 areformed in each of the peripheral walls 15 which are respectivelypositioned on both sides in the width direction of the insertion space2. They respectively correspond to each other so that the engaging claws42 are fitted into the openings 16 as described above.

As seen from FIGS. 1 and 2, a spring member housing space is provided inthe insertion space 2 at each end in the longitudinal direction of theperipheral walls 15, and spring members 5 each consisting of a coilspring are disposed in the spring member housing spaces. Both ends inthe longitudinal direction of the cover member 4 are always urged by thespring members 5 in the direction A2. When the counter electricalconnector 100 is not inserted into the insertion space 2, the engagingfaces 43 of the engaging claws 42 of the cover member 4 which is urgedby the spring members 5 are engaged as shown in FIG. 5 with openingedges 17 of the openings 16 which are positioned in the direction A2.When the engaging faces 43 are engaged with the opening edges 17 so thatthe position of the cover member 4 is restricted, the tip ends of thecontacts 3 are placed at intermediate portions in the axial direction ofthe hole portions 41 which respectively correspond to the contacts. InFIG. 4, the distance between the tip ends of the contacts placed at theintermediate portions in the axial direction of the hole portions 41 andthe opening ends of the hole portions 41 is indicated by the referencesymbol δ. The distance δ is shorter than 1 mm. The opening edges 17 ofthe openings 16, and the engaging faces 43 of the engaging claws 42constitute an engaging mechanism 10 which blocks the cover member 4urged by the spring members 5 from protruding from the insertion space.

FIG. 6 shows a card C having the counter electrical connector 100. Thecounter electrical connector 100 comprises a number of contactintroducing hole portions 120 which are opened in the end face of thebody 110 of the counter electrical connector 100. In each of the contactintroducing hole portions 120, a cylindrical contact is disposed. Thearrangement pattern of the contact introducing hole portions 120 is thesame as that of the contacts 3 of the above-mentioned multipolarelectrical connector B.

The peripheral walls 15 defining the insertion space 2 of theabove-mentioned multipolar electrical connector B serve as a guide forpositioning the counter electrical connector 100 when it is insertedinto the insertion space 2. When the counter electrical connector 100 isto be inserted into the insertion space 2, the counter electricalconnector 100 is positioned by the peripheral walls 15, whereby thecontact introducing hole portions 120 of the counter electricalconnector 100 are aligned with the hole portions 41 of the cover member4, respectively. The diameter D2 of the opening portion of each holeportion 41 of the cover member 4 is set to be a size which is notgreater than or is equal to or smaller than the diameter of the openingportion of each contact introducing hole portion 120 at the end face ofthe counter electrical connector 100.

Next, the function will be described.

When the counter electrical connector 100 is not inserted into theinsertion space 2, the engaging faces 43 of the engaging claws 42disposed on the cover member 4 which is urged by the spring members 5are engaged as shown in FIG. 5 with the opening edges 17 of the openings16 which are opened in the peripheral walls 15 on the side of the body1, or, in other words, the position of the cover member 4 is restrictedby the engaging mechanism 10, whereby the tip ends of the contacts 3 areplaced at intermediate portions in the axial direction of the holeportions 41 of the cover member 4, respectively. Consequently, the tipends of the contacts 3 do not protrude to the outside of the covermember 4. When the multipolar electrical connector is handled,therefore, the contacts 3 never hit anything. Accordingly, the casewhere the contacts 3 are subjected to an external force and are bentdoes not occur, and the contacts 3 are individually protected from anexternal force by the cover member 4. This function is exerted moreremarkably by the configuration in which the contacts 3 are pressinglyinserted into the body 1 and protrude into the insertion space 2.

When the counter electrical connector 100 is inserted into the insertionspace 2, the contact introducing hole portions 120 of the counterelectrical connector 100 are individually aligned with the hole portions41 of the cover member 4 by the guiding function of the peripheral walls15. Furthermore, the diameter D2 of the opening portions of the holeportions 41 of the cover member 4 is not greater than the diameter ofthe opening portions of the contact introducing hole portions 120 whichare opened in the end face of the counter electrical connector 100, andhence the case where the hole edges of the contact introducing holeportions 120 protrude into the opening portions of the hole portions 41of the cover member 4 does not happen. When the counter electricalconnector 100 is inserted into the insertion space 2, therefore, the endface of the counter electrical connector 100 bumps against the covermember 4 as shown in FIG. 7 so that the cover member 4 is pushed againstthe force of the spring members 5 by the counter electrical connector100 to be pressingly inserted in the insertion direction A1. At thistime, the engaging claws 42 are moved in the openings 16 in theinsertion direction A1 of the counter electrical connector 100. As theclaws are moved, the contacts 3 are relatively protruded from the holeportions 41 of the cover member 4, and as shown in FIG. 8 the tip endsof the contacts 3 are introduced into the contact introducing holeportions 120 on the side of the counter electrical connector 100 whilebeing guided by the hole portions 41 of the cover member 4. As a result,the tip ends of the contacts 3 never collide against or are caught bythe end face of the counter electrical connector 100.

The above-mentioned function, i.e., the function whereby the tip ends ofthe contacts 3 are introduced into the contact introducing hole portions120 on the side of the counter electrical connector 100 while beingguided by the hole portions 41 of the cover member 4 is exerted. Evenwhen the axis L1 of one of the contacts 3, such as the contact 3 shownin the right side of FIG. 7 is inclined by θ with respect to the normalaxis L or, in other words, the contact 3 is bent, the contact 3 can beintroduced in an unforced manner into the corresponding contactintroducing hole portion 120 on the side of the counter electricalconnector 100. The contacts 3 which are introduced into the contactintroducing hole portions 120 on the side of the counter electricalconnector 100 are fitted into the cylindrical contacts 130 disposed inthe contact introducing hole portions 120 so as to produce an electricalcontact therewith.

In the embodiment described above, as seen from FIG. 1, a semicircularextension 45 protrudes from each end in the longitudinal direction ofthe cover member 4. The extensions 45 serve as spring pressers for thespring members 5. Void spaces in which the extensions 45 aredisplaceable are ensured in the insertion space 2. Furthermore, bulges140 which can be fitted into the spaces provided in the insertion space2 are formed on both ends of the counter electrical connector 100 shownin FIG. 6. When a configuration is formed in this way in which thecounter electrical connector 100 is pressingly inserted into theinsertion space 2 while aligning the bulges 140 disposed at both ends ofthe counter electrical connector 100 with the void spaces provided inthe insertion space 2, the position of the counter electrical connector100 is hardly shifted in the width direction (i.e., the verticaldirection in FIG. 1) of the insertion space. Consequently, by theabove-mentioned function the contacts 3 are introduced in an unforcedmanner into the contact introducing hole portions 120 on the side of thecounter electrical connector 100.

FIG. 9 shows the multipolar electrical connector B of anotherembodiment. The multipolar electrical connector B is different from theconnector described with reference to FIGS. 1 to 5, 7, and 8 in that theconnector B is provided with the function of preventing the counterelectrical connector 100 from being inserted while the rear side isdirected forward, i.e., an erroneous insertion prevention function.Specifically, in the multipolar electrical connector B of theembodiment, the semicircular extension 45 protrudes only from one end inthe longitudinal direction of the cover member 4, and the extension 45serves as a spring presser for the spring member 5. In contrast, theother end in the longitudinal direction of the cover member 4 is madeflat. In the insertion space 2, a void space in which the extension 45is displaceable is provided only at the one end in the longitudinaldirection of the cover member 4. In the counter electrical connector 100for the thus configured multipolar electrical connector B, as shown inFIG. 10, a bulge 140 which can be fitted into the space provided in theinsertion space 2 is formed only on one end, and the other end is madeflat. According to this configuration, even when the counter electricalconnector 100 is disposed to be inserted while the rear side is directedforward, the counter electrical connector 100 cannot be inserted intothe insertion space 2, and hence the counter connector is prevented frombeing inserted while the rear side is directed forward, or an erroneousinsertion is prevented from occurring. The other configuration,functions and effects are strictly identical with those described withreference to FIGS. 1 to 5, 7, and 8. Therefore, the same components aredesignated by the same reference numerals and their detailed descriptionis omitted.

According to the multipolar electrical connector of the presentinvention, the tip ends of the contacts are disposed in the holeportions of the cover member. Consequently, the contacts areindividually protected by the cover member and the case where, when thecounter electrical connector is not inserted, anything hitting thecontacts is provided. Therefore, the connector can attain an effect thatthe case where an external force is accidentally applied to a contact inhandling, such as that the multipolar electrical connector istransported or mounted to an apparatus and the contact is bent, does notoccur. When the counter electrical connector is not inserted, the covermember prevents dust from entering the insertion space of the body, andhence the multipolar electrical connector can attain the effect thatdust does not adhere to or is not inserted between the contacts arrangedat a small pitch.

When the counter electrical connector is inserted, the tip ends of thecontacts are introduced into the hole portions of the counter electricalconnector while being guided by the hole portions of the cover member.Even when one or more of the contacts are twisted by the counterelectrical connector, therefore, the case where the tip ends of thecontacts collide against or are caught by the end face of the counterelectrical connector never happens. The function of guiding the tip endsof the contacts by the hole portions of the cover member is exerted asfar as, when the counter electrical connector is not inserted, the tipends of the contacts are disposed in the hole portions of the covermember. Consequently, when the counter electrical connector is notinserted, the tip ends of the contacts are disposed in the hole portionof the cover member, and even when a contact is bent, it is possible toattain the effect that the contact can be surely inserted into the holeportion of the counter electrical connector by inserting the counterelectrical connector, so that all the contacts are connected in anunforced manner with the contacts of the counter electrical connector.

We claim:
 1. A multipolar electrical connector, comprising:a body havingan insertion space for a counter electrical connector, said insertionspace defining an opening portion; a plurality of contacts whichprotrude into said insertion space, said plurality of contacts beingarranged at predetermined spaces relative to each other; a cover memberwhich covers the opening portion of said insertion space, said covermember being displaceable in said insertion space in an insertiondirection and an extraction direction relative to said counterelectrical connector; a plurality of hole portions formed in said covermember in an arranged manner and into which a respective one of saidplurality of contacts are loosely inserted; a spring member disposedbetween said body and said cover member for constantly urging said covermember in said extraction direction; and an engaging mechanism disposedbetween said body and said cover member, said engaging mechanismrestricting the position of said cover member urged by said springmember thereby blocking said cover member from protruding from saidinsertion space, and, when the position of said cover member isrestricted, permitting the tip ends of said plurality of contacts toassume intermediate positions in an axial direction of said holeportions, said hole portions respectively corresponding to saidcontacts, said engaging mechanism including a plurality of elongatedclaws which protrude outwardly from an edge of said cover member and aredisposed on both sides of the center of said cover member, wherein: saidengaging claws define engaging faces which oppose said opening edges,said body includes peripheral walls, openings are formed in saidperipheral walls defining said insertion space, said openingsrespectively housing said engaging claws in such a manner that saidengaging claws are displaceable in said insertion and extractiondirection, and said opening edges defining a downstream end in anextraction direction of said openings for fitting said cover body insidesaid insertion space, each of said engaging faces for engaging arespective one of said opening edges, said opening edges and saidengaging faces being positioned opposite to said plural openings of saidcover member, said engaging mechanism further including a guide face forguiding said cover member including said guide face so as to bepositioned in said extraction direction relative to said counterelectrical connector, thereby fitting said cover body inside saidinsertion space, said plural claws elastically protruding outwardly fromboth edges of said cover member and which are housed inside said pluralopenings by elasticity, in fitting said cover member.
 2. The multipolarelectrical connector according to claim 1, wherein the counterelectrical connector has a plurality of contact introducing holeportions in an end face of the counter electrical connector, and whereinthe diameter of each of said hole portions has a size which is notgreater than the diameter of the contact introducing hole portions. 3.The multipolar electrical connector according to claim 1, wherein saidplurality of contacts are pressingly inserted into said body andprotrude into said insertion space, said insertion space being formed insaid body.
 4. The multipolar electrical connector according to claim 1,wherein said spring member is disposed in said insertion space betweensaid body and at at least one longitudinal end of said cover member. 5.The multipolar electrical connector according to claim 1, wherein saidperipheral walls defining said insertion space serve as a positionalalignment guide for insertion of the counter electrical connector intosaid insertion space.
 6. The multipolar electrical connector accordingto claim 1, wherein said cover member includes a semicircular extensionprotruding from both ends in a longitudinal direction of said covermember, said semicircular extensions serving as spring pressers for saidspring members, and wherein void spaces, in which said semicircularextensions are displaceable, are formed in said insertion space of saidbody.
 7. The multipolar electrical connector according to claim 1,wherein said cover member includes a semicircular extension whichprotrudes only from one end in a longitudinal direction of said covermember, said semicircular extension serving as a spring presser for saidspring member, the other end in the longitudinal direction of said covermember is made flat, and a void space in which said extension isdisplaceable is formed in said insertion space.
 8. The multipolarelectrical connector according to claim 1, wherein the tip ends of saidplurality of contacts are located between the front face of said covermember and the rear face of said cover member, and the front face ofsaid cover member is located between the front face of said body and thetip ends of said plurality of contacts, when the counter electricalconnector is not inserted.